import { AgoraRtcDeviceInfo } from '../../../../core/rtc/type';
import { SourceStateControl, SourceStateControlImpl, SourceStateControlObserver } from './source-state-control';
export interface LoopbackStateControlObserver extends SourceStateControlObserver {
}
export interface LoopbackStateControl extends SourceStateControl {
    setLoopbackInstalled(installed: boolean): void;
    getLoopbackList(): AgoraRtcDeviceInfo[];
}
export declare class LoopbackStateControlImpl extends SourceStateControlImpl implements LoopbackStateControl {
    private _isLoopbackInstalled;
    constructor();
    release(): number;
    setLoopbackInstalled(installed: boolean): void;
    getLoopbackList(): AgoraRtcDeviceInfo[];
}